Home / 2,143.79-2,958.45-1,247.75

Finding the Fourth Proportional to 2,143.79, 2,958.45 and 1,247.75

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Solution

The fourth proportional to 2,143.79, 2,958.45 and 1,247.75 is: 1,721.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.79 : 2,958.45 = 1,247.75 : x
  2. Step 2: Convert to fraction form
    2,143.79/2,958.45 = 1,247.75/x
  3. Step 3: Cross multiply
    2,143.79x = 2,958.45 × 1,247.75
  4. Step 4: Simplify right side
    2,143.79x = 3,691,417.76
  5. Step 5: Solve for x
    x = 3,691,417.76/2,143.79
  6. Step 6: Final answer
    x = 1,721.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.